with me on "comunidad del valle" is raquel garcia del real to fill us in. boy, you sent us some very fascinating pictures and images. describe what you're doing to take us to teotihuacan in at the de young. raquel garcia del real: yeah, so this exhibition is really, really unique. it's about over 20 years of collaboration with mexican government and el inah, which is the national institute for anthropology and history. and what we have for you at the museum is over 200 artifacts, many of them recently excavated, new findings, so stuff you have never seen before from this city of teotihuacan, which is a city that is in central mexico and it predates the aztecs. this city was flourishing around the year 400 common era. and we have beautiful murals from them, we have objects made up of obsidian, seashell, jade. and this exhibition is really good 'cause it's really showing you a lot of their culture and a lot of the art that they were producing, but also how teotihuacan was a city. damian: now, i've been to teotihuacan, i've climbed one of the--or walked up to o